Diocles

Diocles is an annex from Season of the Seraph and one of two annexes used in the Should You Choose to Accept It Revision Zero catalyst chain. The other is the Archimedes Annex. Each part of the chain starts by downloading a cryptographic index at an annex, then travels to a planet to decrypt a cipher and uploads it at a dead drop in a Lost Sector.

Diocles is the annex for Part II and Part IV. Part II takes the player to the Moon, and Part IV takes them to the Cosmodrome. Each part ends by completing Operation: Seraph's Shield on Legend difficulty to obtain the weapon schematic and catalyst. The guide covering the chain dates from December 2022, so step details may have changed since.